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Military suicides linked to low Omega-3 levels

Military suicides linked to low Omega-3 levels
Fish oil gels. Low levels of DHA have been linked to military suicides. (Ricardo DeAratanha / Los Angeles Times)

In a finding suggesting powerful psychiatric benefits for a component of

fish oil

, a study published Wednesday has linked military suicides to low levels of docosahexaenoic acid and found that service personnel with higher levels of DHA in their blood were less likely to take their own lives.

The study, published this week in the Journal of Clinical

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Psychiatry
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, looked back at the medical records of 800 U.S. servicemen and women who took their own lives between 2002 and 2008, and compared them with the records of 800 service personnel -- matched for age, gender and rank -- who had no history of suicide attempts.

Men whose records showed they had low levels of DHA in their blood were 62% more likely to have been suicide victims than those with the highest levels.

The

suggests that low DHA levels were an even stronger predictor of suicide than a far-better-recognized risk factor among military personnel: whether the service member reported having had direct exposure to allied troops that had been killed or wounded.

Suicides among

U.S. military

personnel, particularly Army soldiers and Marines who have served in Iraq and Afghanistan, have risen steadily since 2001 and reached a crisis point in 2008, when more than 20 of every 100,000 servicemen and women --roughly twice the national average -- took their own lives. Between 2005 and 2009, 1,100 U.S. servicemen and women took their own lives, and in 2010, the

Defense Department

said 295 active-duty military personnel committed suicide.

The spate of suicides -- in a population that traditionally has had lower suicide rates than their civilian counterparts -- has stirred deep concern within the military. Last year, a Defense Department

called for better suicide-prevention programs, wider use of community expertise in suicide prevention and efforts to destigmatize help-seeking behaviors by U.S. service personnel. The task force also called for more research that could help identify those at greatest risk of attempting suicide and determine how best to help them.

This study, conducted by researchers from the Uniformed Services University of Health Sciences, the National Institute of Alcohol and

Alcohol Abuse

, may help identify a simple fix for service members going into harm's way: supplementation with the highly unsaturated fatty acid DHA, which is not made by the body but

such as fatty fish, as well as eggs and dairy products that have supplemented with DHA. The study's review of 1,600 medical records found that U.S. service personnel generally have low levels of DHA in their blood.

The DHA found in Omega-3 fatty acids appears to play a key role in brain function, and supplementation with the fatty acid appears to have wide-ranging psychiatric benefits. Supplemental DHA has been found to

, to

and

in people at risk for

schizophrenia

. (A

found, however, that DHA supplementation for pregnant women did not lower their risk of post-partum depression or make their babies smarter.) The authors of the current study

stress

that its design has limitations and that more research is needed before the role of DHA levels in suicide is clear.

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